308 NEW SAPROLEGNIE AND ALLIED FORMS, 
Extracts and Abstracts. 
DEVELOPMENT OF SEED OF OROBANCHER. 
“- die Entwickelung des Samens der Orobanchen. Von Dr. Lupwie 
ocx. (Pringsheim’s Jahrbucher fiir wissenschaftliche Botanik. 
Vol xi., p. 21, with 3 plates.) 
Tar author finds that the ovule of she eae has only one integu- 
ment, The endosperm is formed by divi Sd principal betes ° 
i b mb 
micropylar | end. The pl roembryo (saspensor) advances without under- 
going div vision the embryo-sac; itsknob-like extre- 
mity divides transversely into two equal cells, the under of whic 
plays the part of a hypophyse, the other becoming the mother-cell of 
the embryo. e divisions in the upper cell follow the dicotyledonous 
type as satablistied by Hanstein. The dermatogen divisions begin 
mostly in the lower quadrants, while there are often irregularities in 
the upper ones. The inner part of the tissue ite the cotyle- 
donal half of the young embryo remains very simple, is often asym- ~ 
metrically formed, and does not diferentiat into = sae and periblem ; 
while in the radicular aye there is only simple inner tissue often 
irregularly divided. The structure of the embryo of the ripe Oroban- 
cheous seed iia, thereture that of the immature seed of ordin 
Dicotyledons 8. M. 
amma snr 
New Sarroteeyiem anp Atiep Forms. 
Beobachtungen ber einige neue Saprolegniee, iiber die Parasiten 
i ae und | ike die Stachelkugeln in Achlyaschléuchen. 
n P. F. Remscn. (Pringsheim’s Jahrbucher fiir wissenschaft- 
tie otanik. Vol. xi., p. 283.) 
Tux author describes two new Saprolegnious genera, one of which 
(Negelia) grows on stalks of Visewm which have long lain in the 
ear of cl Hed ear shaded ditches, and consists of cyhadeioal unicellular 
bafion oN “nae eregemere aes Sn nin, ane eawel 
containing these large cells usually have a small circular 
pening at the upper end before formation of the membrane. The 
pec! 
